Note no nationality marking only the s/n on the tail and a red fin cap.

Other Helios with the 56th Air commando wing were loaned to Air Asia for clandestine missions and more than likely this one was also. Especially since it has no nationality marks.

It took some hunting to double check but it was with the 56th during July of 1968 the History paragraph above should read as follows; 04/67 (US Pacific Air Forces Command), 56th Air Commando Wing, 606th ACS, Nakhon Phanom Royal Thai AFB, Thailand, pictures show it with all nationality marks removed probably loaned to Air Asia (CIA) for clandestine work - Combat Support Unit status until 12/69